| 1 | /*
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| 2 | * File: ximaico.cpp
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| 3 | * Purpose: Platform Independent ICON Image Class Loader and Writer (MS version)
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| 4 | * 07/Aug/2001 Davide Pizzolato - www.xdp.it
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| 5 | * CxImage version 6.0.0 02/Feb/2008
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| 6 | */
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| 7 |
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| 8 | #include "ximaico.h"
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| 9 |
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| 10 | #if CXIMAGE_SUPPORT_ICO
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| 11 |
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| 12 | ////////////////////////////////////////////////////////////////////////////////
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| 13 | #if CXIMAGE_SUPPORT_DECODE
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| 14 | ////////////////////////////////////////////////////////////////////////////////
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| 15 | bool CxImageICO::Decode(CxFile *hFile)
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| 16 | {
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| 17 | if (hFile==NULL) return false;
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| 18 |
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| 19 | DWORD off = hFile->Tell(); //<yuandi>
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| 20 | int page=info.nFrame; //internal icon structure indexes
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| 21 |
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| 22 | // read the first part of the header
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| 23 | ICONHEADER icon_header;
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| 24 | hFile->Read(&icon_header,sizeof(ICONHEADER),1);
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| 25 |
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| 26 | icon_header.idType = ntohs(icon_header.idType);
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| 27 | icon_header.idCount = ntohs(icon_header.idCount);
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| 28 |
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| 29 | // check if it's an icon or a cursor
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| 30 | if ((icon_header.idReserved == 0) && ((icon_header.idType == 1)||(icon_header.idType == 2))) {
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| 31 |
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| 32 | info.nNumFrames = icon_header.idCount;
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| 33 |
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| 34 | // load the icon descriptions
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| 35 | ICONDIRENTRY *icon_list = (ICONDIRENTRY *)malloc(icon_header.idCount * sizeof(ICONDIRENTRY));
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| 36 | int c;
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| 37 | for (c = 0; c < icon_header.idCount; c++) {
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| 38 | hFile->Read(icon_list + c, sizeof(ICONDIRENTRY), 1);
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| 39 |
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| 40 | icon_list[c].wPlanes = ntohs(icon_list[c].wPlanes);
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| 41 | icon_list[c].wBitCount = ntohs(icon_list[c].wBitCount);
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| 42 | icon_list[c].dwBytesInRes = ntohl(icon_list[c].dwBytesInRes);
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| 43 | icon_list[c].dwImageOffset = ntohl(icon_list[c].dwImageOffset);
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| 44 | }
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| 45 |
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| 46 | if ((page>=0)&&(page<icon_header.idCount)){
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| 47 |
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| 48 | if (info.nEscape == -1) {
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| 49 | // Return output dimensions only
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| 50 | head.biWidth = icon_list[page].bWidth;
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| 51 | head.biHeight = icon_list[page].bHeight;
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| 52 | #if CXIMAGE_SUPPORT_PNG
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| 53 | if (head.biWidth==0 && head.biHeight==0)
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| 54 | { // Vista icon support
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| 55 | hFile->Seek(off + icon_list[page].dwImageOffset, SEEK_SET);
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| 56 | CxImage png;
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| 57 | png.SetEscape(-1);
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| 58 | if (png.Decode(hFile,CXIMAGE_FORMAT_PNG)){
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| 59 | Transfer(png);
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| 60 | info.nNumFrames = icon_header.idCount;
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| 61 | }
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| 62 | }
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| 63 | #endif //CXIMAGE_SUPPORT_PNG
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| 64 | free(icon_list);
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| 65 | info.dwType = CXIMAGE_FORMAT_ICO;
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| 66 | return true;
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| 67 | }
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| 68 |
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| 69 | // get the bit count for the colors in the icon <CoreyRLucier>
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| 70 | BITMAPINFOHEADER bih;
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| 71 | hFile->Seek(off + icon_list[page].dwImageOffset, SEEK_SET);
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| 72 |
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| 73 | if (icon_list[page].bWidth==0 && icon_list[page].bHeight==0)
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| 74 | { // Vista icon support
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| 75 | #if CXIMAGE_SUPPORT_PNG
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| 76 | CxImage png;
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| 77 | if (png.Decode(hFile,CXIMAGE_FORMAT_PNG)){
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| 78 | Transfer(png);
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| 79 | info.nNumFrames = icon_header.idCount;
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| 80 | }
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| 81 | SetType(CXIMAGE_FORMAT_ICO);
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| 82 | #endif //CXIMAGE_SUPPORT_PNG
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| 83 | }
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| 84 | else
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| 85 | { // standard icon
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| 86 | hFile->Read(&bih,sizeof(BITMAPINFOHEADER),1);
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| 87 |
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| 88 | bihtoh(&bih);
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| 89 |
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| 90 | c = bih.biBitCount;
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| 91 |
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| 92 | // allocate memory for one icon
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| 93 | Create(icon_list[page].bWidth,icon_list[page].bHeight, c, CXIMAGE_FORMAT_ICO); //image creation
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| 94 |
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| 95 | // read the palette
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| 96 | RGBQUAD pal[256];
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| 97 | if (bih.biClrUsed)
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| 98 | hFile->Read(pal,bih.biClrUsed*sizeof(RGBQUAD), 1);
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| 99 | else
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| 100 | hFile->Read(pal,head.biClrUsed*sizeof(RGBQUAD), 1);
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| 101 |
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| 102 | SetPalette(pal,head.biClrUsed); //palette assign
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| 103 |
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| 104 | //read the icon
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| 105 | if (c<=24){
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| 106 | hFile->Read(info.pImage, head.biSizeImage, 1);
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| 107 | } else { // 32 bit icon
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| 108 | BYTE* buf=(BYTE*)malloc(4*head.biHeight*head.biWidth);
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| 109 | BYTE* src = buf;
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| 110 | hFile->Read(buf, 4*head.biHeight*head.biWidth, 1);
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| 111 | #if CXIMAGE_SUPPORT_ALPHA
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| 112 | if (!AlphaIsValid()) AlphaCreate();
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| 113 | #endif //CXIMAGE_SUPPORT_ALPHA
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| 114 | for (long y = 0; y < head.biHeight; y++) {
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| 115 | BYTE* dst = GetBits(y);
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| 116 | for(long x=0;x<head.biWidth;x++){
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| 117 | *dst++=src[0];
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| 118 | *dst++=src[1];
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| 119 | *dst++=src[2];
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| 120 | #if CXIMAGE_SUPPORT_ALPHA
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| 121 | AlphaSet(x,y,src[3]);
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| 122 | #endif //CXIMAGE_SUPPORT_ALPHA
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| 123 | src+=4;
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| 124 | }
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| 125 | }
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| 126 | free(buf);
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| 127 | }
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| 128 | // apply the AND and XOR masks
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| 129 | int maskwdt = ((head.biWidth+31) / 32) * 4; //line width of AND mask (always 1 Bpp)
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| 130 | int masksize = head.biHeight * maskwdt; //size of mask
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| 131 | BYTE *mask = (BYTE *)malloc(masksize);
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| 132 | if (hFile->Read(mask, masksize, 1)){
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| 133 |
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| 134 | bool bGoodMask=false;
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| 135 | for (int im=0;im<masksize;im++){
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| 136 | if (mask[im]!=255){
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| 137 | bGoodMask=true;
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| 138 | break;
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| 139 | }
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| 140 | }
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| 141 |
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| 142 | if (bGoodMask){
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| 143 | #if CXIMAGE_SUPPORT_ALPHA
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| 144 | bool bNeedAlpha = false;
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| 145 | if (!AlphaIsValid()){
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| 146 | AlphaCreate();
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| 147 | } else {
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| 148 | bNeedAlpha=true; //32bit icon
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| 149 | }
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| 150 | int x,y;
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| 151 | for (y = 0; y < head.biHeight; y++) {
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| 152 | for (x = 0; x < head.biWidth; x++) {
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| 153 | if (((mask[y*maskwdt+(x>>3)]>>(7-x%8))&0x01)){
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| 154 | AlphaSet(x,y,0);
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| 155 | bNeedAlpha=true;
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| 156 | }
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| 157 | }
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| 158 | }
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| 159 | if (!bNeedAlpha) AlphaDelete();
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| 160 | #endif //CXIMAGE_SUPPORT_ALPHA
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| 161 |
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| 162 | //check if there is only one transparent color
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| 163 | RGBQUAD cc,ct;
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| 164 | long* pcc = (long*)&cc;
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| 165 | long* pct = (long*)&ct;
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| 166 | int nTransColors=0;
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| 167 | int nTransIndex=0;
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| 168 | for (y = 0; y < head.biHeight; y++){
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| 169 | for (x = 0; x < head.biWidth; x++){
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| 170 | if (((mask[y*maskwdt+(x>>3)] >> (7-x%8)) & 0x01)){
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| 171 | cc = GetPixelColor(x,y,false);
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| 172 | if (nTransColors==0){
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| 173 | nTransIndex = GetPixelIndex(x,y);
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| 174 | nTransColors++;
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| 175 | ct = cc;
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| 176 | } else {
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| 177 | if (*pct!=*pcc){
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| 178 | nTransColors++;
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| 179 | }
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| 180 | }
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| 181 | }
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| 182 | }
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| 183 | }
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| 184 | if (nTransColors==1){
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| 185 | SetTransColor(ct);
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| 186 | SetTransIndex(nTransIndex);
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| 187 | #if CXIMAGE_SUPPORT_ALPHA
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| 188 | AlphaDelete(); //because we have a unique transparent color in the image
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| 189 | #endif //CXIMAGE_SUPPORT_ALPHA
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| 190 | }
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| 191 |
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| 192 | // <vho> - Transparency support w/o Alpha support
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| 193 | if (c <= 8){ // only for icons with less than 256 colors (XP icons need alpha).
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| 194 |
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| 195 | // find a color index, which is not used in the image
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| 196 | // it is almost sure to find one, bcs. nobody uses all possible colors for an icon
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| 197 |
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| 198 | BYTE colorsUsed[256];
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| 199 | memset(colorsUsed, 0, sizeof(colorsUsed));
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| 200 |
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| 201 | for (y = 0; y < head.biHeight; y++){
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| 202 | for (x = 0; x < head.biWidth; x++){
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| 203 | colorsUsed[BlindGetPixelIndex(x,y)] = 1;
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| 204 | }
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| 205 | }
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| 206 |
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| 207 | int iTransIdx = -1;
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| 208 | for (x = (int)(head.biClrUsed-1); x>=0 ; x--){
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| 209 | if (colorsUsed[x] == 0){
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| 210 | iTransIdx = x; // this one is not in use. we may use it as transparent color
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| 211 | break;
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| 212 | }
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| 213 | }
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| 214 |
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| 215 | // Go thru image and set unused color as transparent index if needed
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| 216 | if (iTransIdx >= 0){
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| 217 | bool bNeedTrans = false;
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| 218 | for (y = 0; y < head.biHeight; y++){
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| 219 | for (x = 0; x < head.biWidth; x++){
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| 220 | // AND mask (Each Byte represents 8 Pixels)
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| 221 | if (((mask[y*maskwdt+(x>>3)] >> (7-x%8)) & 0x01)){
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| 222 | // AND mask is set (!=0). This is a transparent part
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| 223 | SetPixelIndex(x, y, (BYTE)iTransIdx);
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| 224 | bNeedTrans = true;
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| 225 | }
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| 226 | }
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| 227 | }
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| 228 | // set transparent index if needed
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| 229 | if (bNeedTrans) SetTransIndex(iTransIdx);
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| 230 | #if CXIMAGE_SUPPORT_ALPHA
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| 231 | AlphaDelete(); //because we have a transparent color in the palette
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| 232 | #endif //CXIMAGE_SUPPORT_ALPHA
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| 233 | }
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| 234 | }
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| 235 | } else {
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| 236 | SetTransIndex(0); //empty mask, set black as transparent color
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| 237 | Negative();
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| 238 | }
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| 239 | }
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| 240 | free(mask);
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| 241 | }
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| 242 | free(icon_list);
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| 243 | // icon has been loaded successfully!
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| 244 | return true;
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| 245 | }
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| 246 | free(icon_list);
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| 247 | }
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| 248 | return false;
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| 249 | }
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| 250 | ////////////////////////////////////////////////////////////////////////////////
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| 251 | #endif //CXIMAGE_SUPPORT_DECODE
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| 252 | ////////////////////////////////////////////////////////////////////////////////
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| 253 | #if CXIMAGE_SUPPORT_ENCODE
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| 254 | ////////////////////////////////////////////////////////////////////////////////
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| 255 | // Thanks to <Alas>
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| 256 | bool CxImageICO::Encode(CxFile * hFile, CxImage ** pImages, int nPageCount)
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| 257 | {
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| 258 | cx_try
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| 259 | {
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| 260 | if (hFile==NULL) cx_throw("invalid file pointer");
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| 261 | if (pImages==NULL || nPageCount<=0) cx_throw("multipage ICO, no images!");
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| 262 |
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| 263 | int i;
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| 264 | for (i=0; i<nPageCount; i++){
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| 265 | if (pImages[i]==NULL)
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| 266 | cx_throw("Bad image pointer");
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| 267 | if (!(pImages[i]->IsValid()))
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| 268 | cx_throw("Empty image");
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| 269 | }
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| 270 |
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| 271 | CxImageICO ghost;
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| 272 | for (i=0; i<nPageCount; i++){ //write headers
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| 273 | ghost.Ghost(pImages[i]);
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| 274 | ghost.info.nNumFrames = nPageCount;
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| 275 | if (i==0) {
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| 276 | if (!ghost.Encode(hFile,false,nPageCount))
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| 277 | cx_throw("Error writing ICO file header");
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| 278 | }
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| 279 | if (!ghost.Encode(hFile,true,nPageCount))
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| 280 | cx_throw("Error saving ICO image header");
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| 281 | }
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| 282 | for (i=0; i<nPageCount; i++){ //write bodies
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| 283 | ghost.Ghost(pImages[i]);
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| 284 | ghost.info.nNumFrames = nPageCount;
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| 285 | if (!ghost.Encode(hFile,true,i))
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| 286 | cx_throw("Error saving ICO body");
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| 287 | }
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| 288 |
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| 289 | } cx_catch {
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| 290 | if (strcmp(message,"")) strncpy(info.szLastError,message,255);
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| 291 | return false;
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| 292 | }
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| 293 | return true;
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| 294 | }
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| 295 | ////////////////////////////////////////////////////////////////////////////////
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| 296 | bool CxImageICO::Encode(CxFile * hFile, bool bAppend, int nPageCount)
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| 297 | {
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| 298 | if (EncodeSafeCheck(hFile)) return false;
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| 299 |
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| 300 | #if CXIMAGE_SUPPORT_PNG == 0
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| 301 | //check format limits
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| 302 | if ((head.biWidth>255)||(head.biHeight>255)){
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| 303 | strcpy(info.szLastError,"Can't save this image as icon");
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| 304 | return false;
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| 305 | }
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| 306 | #endif
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| 307 |
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| 308 | //prepare the palette struct
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| 309 | RGBQUAD* pal=GetPalette();
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| 310 | if (head.biBitCount<=8 && pal==NULL) return false;
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| 311 |
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| 312 | int maskwdt=((head.biWidth+31)/32)*4; //mask line width
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| 313 | int masksize=head.biHeight * maskwdt; //size of mask
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| 314 | int bitcount=head.biBitCount;
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| 315 | int imagesize=head.biSizeImage;
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| 316 | #if CXIMAGE_SUPPORT_ALPHA
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| 317 | if (AlphaIsValid() && head.biClrUsed==0){
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| 318 | bitcount=32;
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| 319 | imagesize=4*head.biHeight*head.biWidth;
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| 320 | }
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| 321 | #endif
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| 322 |
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| 323 | //fill the icon headers
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| 324 | int nPages = nPageCount;
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| 325 | if (nPages<1) nPages = 1;
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| 326 |
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| 327 | ICONHEADER icon_header={0,1,nPages};
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| 328 |
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| 329 | if (!bAppend)
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| 330 | m_dwImageOffset = sizeof(ICONHEADER) + nPages * sizeof(ICONDIRENTRY);
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| 331 |
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| 332 | DWORD dwBytesInRes = sizeof(BITMAPINFOHEADER)+head.biClrUsed*sizeof(RGBQUAD)+imagesize+masksize;
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| 333 |
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| 334 | ICONDIRENTRY icon_list={
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| 335 | (BYTE)head.biWidth,
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| 336 | (BYTE)head.biHeight,
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| 337 | (BYTE)head.biClrUsed,
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| 338 | 0, 0,
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| 339 | (WORD)bitcount,
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| 340 | dwBytesInRes,
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| 341 | m_dwImageOffset
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| 342 | };
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| 343 |
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| 344 | BITMAPINFOHEADER bi={
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| 345 | sizeof(BITMAPINFOHEADER),
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| 346 | head.biWidth,
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| 347 | 2*head.biHeight,
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| 348 | 1,
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| 349 | (WORD)bitcount,
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| 350 | 0, imagesize,
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| 351 | 0, 0, 0, 0
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| 352 | };
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| 353 |
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| 354 | #if CXIMAGE_SUPPORT_PNG // Vista icon support
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| 355 | CxImage png(*this);
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| 356 | CxMemFile memfile;
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| 357 | if (head.biWidth>255 || head.biHeight>255){
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| 358 | icon_list.bWidth = icon_list.bHeight = 0;
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| 359 | memfile.Open();
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| 360 | png.Encode(&memfile,CXIMAGE_FORMAT_PNG);
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| 361 | icon_list.dwBytesInRes = dwBytesInRes = memfile.Size();
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| 362 | }
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| 363 | #endif //CXIMAGE_SUPPORT_PNG
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| 364 |
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| 365 | if (!bAppend){
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| 366 | icon_header.idType = ntohs(icon_header.idType);
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| 367 | icon_header.idCount = ntohs(icon_header.idCount);
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| 368 | hFile->Write(&icon_header,sizeof(ICONHEADER),1); //write the file header
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| 369 | icon_header.idType = ntohs(icon_header.idType);
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| 370 | icon_header.idCount = ntohs(icon_header.idCount);
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| 371 | }
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| 372 |
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| 373 |
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| 374 | if ((bAppend && nPageCount==info.nNumFrames) || (!bAppend && nPageCount==0)){
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| 375 | icon_list.wPlanes = ntohs(icon_list.wPlanes);
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| 376 | icon_list.wBitCount = ntohs(icon_list.wBitCount);
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| 377 | icon_list.dwBytesInRes = ntohl(icon_list.dwBytesInRes);
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| 378 | icon_list.dwImageOffset = ntohl(icon_list.dwImageOffset);
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| 379 | hFile->Write(&icon_list,sizeof(ICONDIRENTRY),1); //write the image entry
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| 380 | icon_list.wPlanes = ntohs(icon_list.wPlanes);
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| 381 | icon_list.wBitCount = ntohs(icon_list.wBitCount);
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| 382 | icon_list.dwBytesInRes = ntohl(icon_list.dwBytesInRes);
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| 383 | icon_list.dwImageOffset = ntohl(icon_list.dwImageOffset);
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| 384 |
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| 385 | m_dwImageOffset += dwBytesInRes; //update offset for next header
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| 386 | }
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| 387 |
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| 388 | if ((bAppend && nPageCount<info.nNumFrames) || (!bAppend && nPageCount==0))
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| 389 | {
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| 390 | #if CXIMAGE_SUPPORT_PNG
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| 391 | if (icon_list.bWidth==0 && icon_list.bHeight==0) { // Vista icon support
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| 392 | hFile->Write(memfile.GetBuffer(false),dwBytesInRes,1);
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| 393 | } else
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| 394 | #endif //CXIMAGE_SUPPORT_PNG
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| 395 | { // standard icon
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| 396 | bihtoh(&bi);
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| 397 | hFile->Write(&bi,sizeof(BITMAPINFOHEADER),1); //write the image header
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| 398 | bihtoh(&bi);
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| 399 |
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| 400 | bool bTransparent = info.nBkgndIndex >= 0;
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| 401 | RGBQUAD ct = GetTransColor();
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| 402 | if (pal){
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| 403 | if (bTransparent) SetPaletteColor((BYTE)info.nBkgndIndex,0,0,0,0);
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| 404 | hFile->Write(pal,head.biClrUsed*sizeof(RGBQUAD),1); //write palette
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| 405 | if (bTransparent) SetPaletteColor((BYTE)info.nBkgndIndex,ct);
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| 406 | }
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| 407 |
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| 408 | #if CXIMAGE_SUPPORT_ALPHA
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| 409 | if (AlphaIsValid() && head.biClrUsed==0){
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| 410 | BYTE* buf=(BYTE*)malloc(imagesize);
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| 411 | BYTE* dst = buf;
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| 412 | for (long y = 0; y < head.biHeight; y++) {
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| 413 | BYTE* src = GetBits(y);
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| 414 | for(long x=0;x<head.biWidth;x++){
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| 415 | *dst++=*src++;
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| 416 | *dst++=*src++;
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| 417 | *dst++=*src++;
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| 418 | *dst++=AlphaGet(x,y);
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| 419 | }
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| 420 | }
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| 421 | hFile->Write(buf,imagesize, 1);
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| 422 | free(buf);
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| 423 | } else {
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| 424 | hFile->Write(info.pImage,imagesize,1); //write image
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| 425 | }
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| 426 | #else
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| 427 | hFile->Write(info.pImage,imagesize,1); //write image
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| 428 | #endif
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| 429 |
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| 430 | //save transparency mask
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| 431 | BYTE* mask=(BYTE*)calloc(masksize,1); //create empty AND/XOR masks
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| 432 | if (!mask) return false;
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| 433 |
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| 434 | //prepare the variables to build the mask
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| 435 | BYTE* iDst;
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| 436 | int pos,i;
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| 437 | RGBQUAD c={0,0,0,0};
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| 438 | long* pc = (long*)&c;
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| 439 | long* pct= (long*)&ct;
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| 440 | #if CXIMAGE_SUPPORT_ALPHA
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| 441 | bool bAlphaPaletteIsValid = AlphaPaletteIsValid();
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| 442 | bool bAlphaIsValid = AlphaIsValid();
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| 443 | #endif
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| 444 | //build the mask
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|---|
| 445 | for (int y = 0; y < head.biHeight; y++) {
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| 446 | for (int x = 0; x < head.biWidth; x++) {
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|---|
| 447 | i=0;
|
|---|
| 448 | #if CXIMAGE_SUPPORT_ALPHA
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| 449 | if (bAlphaIsValid && AlphaGet(x,y)==0) i=1;
|
|---|
| 450 | if (bAlphaPaletteIsValid && BlindGetPixelColor(x,y).rgbReserved==0) i=1;
|
|---|
| 451 | #endif
|
|---|
| 452 | c=GetPixelColor(x,y,false);
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|---|
| 453 | if (bTransparent && *pc==*pct) i=1;
|
|---|
| 454 | iDst = mask + y*maskwdt + (x>>3);
|
|---|
| 455 | pos = 7-x%8;
|
|---|
| 456 | *iDst &= ~(0x01<<pos);
|
|---|
| 457 | *iDst |= ((i & 0x01)<<pos);
|
|---|
| 458 | }
|
|---|
| 459 | }
|
|---|
| 460 | //write AND/XOR masks
|
|---|
| 461 | hFile->Write(mask,masksize,1);
|
|---|
| 462 | free(mask);
|
|---|
| 463 | }
|
|---|
| 464 | }
|
|---|
| 465 |
|
|---|
| 466 | return true;
|
|---|
| 467 | }
|
|---|
| 468 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 469 | #endif // CXIMAGE_SUPPORT_ENCODE
|
|---|
| 470 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 471 | #endif // CXIMAGE_SUPPORT_ICO
|
|---|
| 472 |
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